Dredge bucket



G. R. HANKS.

DREDGE BUCKET. APPLICATION FILED M16. 1., I911.-

Patented June 27 1 INVENTOR. George flab/m Y ATTORNEY.

UNITED STATES PATENT oerce.

GEORGE 3. KS, OF HIGH BRIDGE, NEW JERSEY, ASSIGNOR T0 TAYLOR-WHARTONIRDN AND STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, K CORPORATION OF NEWJERSEY.

DREDGE BUCKET.

Patented June 27, 1922.

Application filed August 1, 1921. Serial No. 488,880.

To all whom it my camera:

Besit known that I, GEORGE HANKS, a citizen of the United States,residing at High Bridge, in'the county of Hunterdon and State of NewJersey, have invented certain new and useful Improvements in DredgeBuckets, of which the following is a specification.

Dredge buckets cast in one piece with the usual central eye and airedeyes for rigging purposes are pon erous constructions and offer seriousfoundry and treating problems. Especially is this true of buckets madeof alloy steel, such as maganese steel, which requires special heattreatment to provide the requisite wearing properties. The difficultiesare due largel to the unbalanced area of metal and particularly to thegreat masses of metal, connecting the eyes with the body, which developinner checks, cracks and tears. There is no way of detecting theseconditions since the casting is ap parently sound, so that the ultimatebreaking of an eye in service frequently wrecks the entire bucket lineand is a heavy item of expense in time, labor, and replacement.

The object of my invention 1s to provide for sound castings and toprovide for uniformity in coolm following heat treatment, of thosereglons of the bucket which are subjected to the enormous stressesimposed by ordinary service conditions. I attain this object 1nthe-manner and by the means hereinafter described and claimed, referencebeing had to the accompanying drawings, in which- Figure 1 is a sideelevation of the bottom of a dredge bucket with the eyes and connectingwebs formed in accordance with my invention.-

Fig. 2 isa vertical sectional view of the same.

Fig. 3 a section on the line 3-3 of of substantial dimensiontransversely of the bucket. For the "PHI'POSGTOT' this invention, themetal bounding the eyes is formed with reduced sections by providingrecesses 5 separated by'bridging elements or webs 6.-

It will be understood that this construction prevails on both sides ofthe eye, except that the webs and recesses on one side are staggeredwith relation to those on the other side. Moreover, the recesses are ofgradually increasing size from the relatively upward forward portion ofthe eye to the relatively lower rear portion thereof, and the recessesincrease in number proportionately to the increase in mass or thicknessof metal. The webs 4 are also formed on their inner and outer surfaceswith recesses 7, which are preferably along the free edge of the web orthe region of greatest straln.

The central eye 3 throughout that portion beyond the bucket body isformed with a series of alternating ribs and depressions, respectivelyindicated at 8 and 9 the terminal rib forming and offset web 10.

. The described construction not only simplifies foundry problems, butprovides for a greater range or area of heat treatment and for uniformcooling, whereby the developthereof formed with re-entrant portions toprovidefor uniform cooling following heat treatment. 2. A maganese steeldredge bucket bottom having strain serving portions formed with recessesor pockets to ensure uniform cooling under heat treatment.

3. A' manganese steel dredge bucket bot tom whereof the eyes are formedwith alternating webs and recesses.

4. A manganese steel dredge bucket bottom cast with integral eyes formedon both sides with concentric webs and recesses.

5. A manganese steel dredge bucket bottom cast with integral-eyes formedwith alternating webs and recesses, the recesses increasing in size-inproportion to the mass of metal.

6. A manganese steel dredge bucket boteyes and with a cored portion orcorridor tom cast with integral eyes formed on both in the interveningmetal, the masses joining sides with concentric webs and recesses, thethe eyes to the body being ribbed and de- 10 webs and recesses on oneside being stagpressed.

5 gered with respect to the others. In testimony whereof I aflix mysignature. 7. A manganese steel dredge bucket bottom cast with a centraleye and with paired GEORGE R. HANKS.

